Der Ami, I now have a set of 20 cases made from 7x65R brass, and they work fine. The largest diameter base I found was on some 9.2x74 cases from RWS. They are several years old. I'm curious to find out if the currently made ones are also larger than those from Norma. I think Hornady makes 9.3 brass too .I haven't had a chance to measure any of those.